Grinding wheel



Oct. 13, 1931.

Filed June 24.

INVENTOR n llll illll 'I ATTORNEYS Patented a. 13,1931" UN TED-staresPATENT OFFICE GnonGE E. 'vANcE, or SPRINGFIELD, orrro, AssI Non To THESAFETY GRIN ING WHEEL & MACHINE COMPANY, on SPRINGFIELD, orrro, ACORPORATION OF OHIO I GRINDING WHEEL Application filed June 24,"

collars to not only secure the abrasive element on the shaft of thewheel, but a-lso'pre- 1o vent pieces of the abrasive elem nt from fly:

ing outwardly by centrifugal force in case ct breakage. It has beenfound. that when such collars are employed in large size wheels, PM.ticularly high-speed wheels, the weight of the collars isso great as tomake it impossible to maintain the proper speed.

The object of my invention is to" provide collars so constructed as tomaintain the proper rigidity and strength but also elim1-',

nate excessive weight so that the proper speed of the wheel maybesecuredb Referring to the drawings: I

Fig. 1 is a vertical section of a wheelem- :bodying my improvements, thesection being on the line 11 of Fig. 2.

Fig. 2 is a side elevation. Fig. 3is vertical section of a modified Iform of wheel, the section being on the line 3-3 of. Fig. 4c. 7 I I Fig.4 is a side elevation of the modification partly broken away. I g K Fig.5 is avertical section of aportion of. a clamping collar showing anothermodification. p

Fig. 6 is a side elevation of a portion of a wheel in which the modifiedform of clamp-' ing collar shown in Fig. 5 is employed.

Referring first of Figs. 1 and 2. 1 represents the shaft of a grindingwheel, 2 a centering hub mounted on the shaft. 3 the abrasive elementwhich'is formed in any usual and well known manner of abrasivematerial,-t the collars. 5 suitable washers, and 6 a nut threaded on theshaft. In this construction each of the collars is a casting'which iscoredout to form in effect a pair of disks with rad1allyextendingspacing, connecting andstrengthening ribs 7 of any suitable numbertherebetween. This construction not only gives the required rigidity andstrength but furnishes the desired rigidity, strengthand lightness is1929'. Serial No. 373,077.

the desired degree of lightness. Preferably the inner disk of eachcollar is cast with openings 8 to permit the removal of the sand and iecollars are converged toward th periphe ies to accommodate them to thetapered abrasive element to furnish the desired degiee of safety. Iln'Figs. 3 and 4 there is. shown a modification in which these clampingcollars indicated at 4 are formed with inner shouldersl) npon which theabrasive element 3 is seated and centered, thus eliminating the separatehub member 2; The collars in this modificatron are otherwise constructedlike the col lars shown in Fig. 1 in that they are cast strei'igthening,ribs 7'. I p v In Figs. 5 and 6 there is shown a clamping collar of abuilt up character in which two, sheet metal disks 10 and 11 are spacedapart by a series of metal ribs 12, the disks and ribs being connectedtogether by rivets 13.

By this construction, a clamping collar of spacing and connectingprovided which can be applied to large size, high speed grinding wheelswitho'ut interfer-f ence with the proper speed of the wheel. 7

Having thus described my invention, I 7 claim: I l In a grinding wheel,an annular tapered abrasive element, and a pairof clamping collars oneon each side of said element toclamp said element therebetween, each ofsaid collars being, formed of two sheet metal disks as and a series ofseparate radially-extending ribs therebetween, together with means forconnecting the disks and ribs together.-

In testimony whereof, I have hereunto set, myhand this 21st day of June.1929. GEORGE EVANOE.

65 V with inner and outer disks with interior

